The Confused eusarca is a member of the Geometridae family that occurs in North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

. It is the only member of the Eusarca

Eusarca

Eusarca is a genus of moth in the family Geometridae.-References:*...

genus that inhabits the northern portion of the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 and Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

.

Identification

The wingspan of this species is between 29 and 41mm. Adults are quite variable but tend to be yellow to tan with gray smudging, some specimens look exceptionally dark compared to lighter variants. Uncommonly individuals will have dark spotting in the subterminal area of the forewing. There are several species that are easily confused with E. confusaria including the Dark-edged eusarca (Eusarca fundaria), Juniper geometer (Patalene olyzonaria

Patalene olyzonaria

The Juniper-twig Geometer is a moth of the Geometridae family. It is found from Quebec and New Hampshire to Florida, west to Texas, north to Wisconsin.The wingspan is 21-25 mm. Adults are on wing from April to November...

), Curve-toothed geometer (Eutrapela clemataria), Large maple spanworm (Prochoerodes lineola

Prochoerodes lineola

The Large Maple Spanworm is a moth of the Geometridae family. It is found from Nova Scotia to Florida, west to Texas and north to Alberta....

) and the Rose hooktip (Oreta rosea).

Life cycle

There is one flight from April to October throughout its range. Larvae feed on Asters, Clover

Clover

Clover , or trefoil, is a genus of about 300 species of plants in the leguminous pea family Fabaceae. The genus has a cosmopolitan distribution; the highest diversity is found in the temperate Northern Hemisphere, but many species also occur in South America and Africa, including at high altitudes...

, Dandelions, and Goldenrod

Goldenrod

Solidago, commonly called goldenrods, is a genus of about 100 species of flowering plants in the family Asteraceae. Most are herbaceous perennial species found in the meadows and pastures, along roads, ditches and waste areas in North America. There are also a few species native to Mexico, South...

.

Range and habitat

Throughout its flight they can be found in the eastern portions of North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

 including Nova Scotia

Nova Scotia

Nova Scotia is one of Canada's three Maritime provinces and is the most populous province in Atlantic Canada. The name of the province is Latin for "New Scotland," but "Nova Scotia" is the recognized, English-language name of the province. The provincial capital is Halifax. Nova Scotia is the...

 south to Florida

Florida

Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

. They are as far west as Texas

Texas

Texas is the second largest U.S. state by both area and population, and the largest state by area in the contiguous United States.The name, based on the Caddo word "Tejas" meaning "friends" or "allies", was applied by the Spanish to the Caddo themselves and to the region of their settlement in...

 and Saskatchewan

Saskatchewan

Saskatchewan is a prairie province in Canada, which has an area of . Saskatchewan is bordered on the west by Alberta, on the north by the Northwest Territories, on the east by Manitoba, and on the south by the U.S. states of Montana and North Dakota....

. Throughout this range they can be found in meadows and fields with their host plants.